Subbing after a T

[Hoosier Daddy]

I was wondering how everyone handled subbing after a T on a player. If the coach wants to replace the player do you:

1) Sub immediately
2) Between free throws (as stated per rule) or
3) After both free throws?

-Say you are shooting bonus free throws then the technical free throws. If you sub immediately are you then going to bring in any additional subs who want to enter the game? Or do you make them all wait?

I know the rule requires the sub to enter before the last free throw attempt. But thought it would be interesting to see what everyone has to say.